Improvement in springs for seats



UNITED STATES ZENAS COBB, OF CHICAGO, ILLINOIS.

IMPROVEMENT IN SPRINGS FOR SEATS, &c.

Specification forming part of Letters Patent No. 116,557, (lated July 4,1871.

To all whom t may concern:

Be it known that I, ZENAS COBB, of the city of Chicago, county of Cookand State of Illinois, have invented a new and improved Spring; and I dohereby declare the following to be a full, clear, and exact descriptionthereof, which will enable others skilled in the art to make and use thesame, reference being had to the accompanying drawing forming part ofthis specification, in which- Fignre 1 is a side elevation, and Fig. 2is a top view.

Similar letters of reference indicate like parts.

My invention relates to the construction of metallic springs, moreespecially adapted to railway-car seats and other similar npholsteringpurposes.

I construct my spring of flattened steel, of the dimensions desired, asshown at A A, and coiled in an annular form, so that two or more layersot' the coils of the spring come in contact and are firmly and securelyfastened together with a metal clasp, as shown at B B.

By this mode of construction the spring is made stronger, firmer,offering greater resistance to the weight placed thereon, and lessliable to move or bend laterally and get out of shape, and much cheaperthan the springs in ordinary use for similar purposes.

In using my spring in a car-seat the spring is placed upright orvertical, and firmly and rigidly fastened to the bottom or base of theseat by means of two or more staples, or other similar and suitablefastenings, and also sewedfast at the top so as to keep the same inposition to the up holstering fabric used in covering or upholsterng theseat.

Having thus described the nature and object of my invention, what Iclaim as new, and desire to secure by Letters Patent, is-

As a new article of manufacture, the annular coiled spring A A,consisting of two or more coils of Jflattened steel wire, and joinedtogether by the metallic clasp B B, substantially as specified.

The foregoing specification of my invention

